[gnome-music/wip/jfelder/songwidget-coreson-bind-properties: 2/3] songwidget: Define song_number property

[Jean Felder <jfelder src gnome org>]

commit d7128aa1071b3924e5edb639fb59c816be4fa64c
Author: Jean Felder <jfelder src gnome org>
Date:   Sat Feb 29 21:54:42 2020 +0100

    songwidget: Define song_number property
    
    This will be used in the next commit to create a binding with the
    CoreSong track number property.

 gnomemusic/widgets/songwidget.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
---
diff --git a/gnomemusic/widgets/songwidget.py b/gnomemusic/widgets/songwidget.py
index cd0fbe97..e6eccd77 100644
--- a/gnomemusic/widgets/songwidget.py
+++ b/gnomemusic/widgets/songwidget.py
@@ -306,3 +306,23 @@ class SongWidget(Gtk.EventBox):
             self._play_icon.set_visible(True)
         else:
             self._play_icon.props.icon_name = SongStateIcon.PLAYING.value
+
+    @GObject.Property(type=str, default="")
+    def song_number(self):
+        """Get song number label
+
+        :returns: the song number
+        :rtype: str
+        """
+        return self._number_label.props.label
+
+    @song_number.setter
+    def song_number(self, new_nr):
+        """Set song number label from an integer
+
+        :param int new_nr: new song number
+        """
+        if new_nr == 0:
+            new_nr = ""
+
+        self._number_label.props.label = str(new_nr)